Please Help ID Roman coin

[Tanit]

Hi

Someone sent me these pictures of a coin. He wants to sell it to me.
The coin measures approximately 25-27mm.
I couldn't identify it.
Thank you in advance for your help

[djmacdo]

Please read the rules.  We do not deal with potential purchases here.

[Tanit]

Please read the rules.  We do not deal with potential purchases here.

I couldn't find a rule that talks about potential purchases. The only rule n° 2 is for sales, not for purchases.
In addition I request assistance for one coin and not for a large number of coins


2.  DO NOT USE THIS BOARD AS A TOOL FOR YOUR EBAY OR OTHER SALES.  Its OK for our regular members to get help with a few coins now and then and then sell them on eBay.  But listing a large group of coins, getting free attribution assistance, and then selling the coins on eBay, your website or anywhere but our Members' Auction is not permitted.  Requesting assistance for a large number of coins and then selling them may result in being banned.

[Snegovik]

The top image strongly resembles Constantine commemorative with veiled bust. Can you please verify that both sides are from the same coin and that the size is correct?

[Tanit]

The top image strongly resembles Constantine commemorative with veiled bust. Can you please verify that both sides are from the same coin and that the size is correct?

Both sides are the same coin, for sure, but the size is approximate. I will know the exact weight and dimension tomorrow.

[Snegovik]

Please compare

https://www.acsearch.info/image.html?id=5159307

The diameter of these is 15-17 mm

[Tanit]

Please compare

https://www.acsearch.info/image.html?id=5159307

The diameter of these is 15-17 mm

Please give the link to the page: access to the image is denied

[Snegovik]

https://www.acsearch.info/search.html?id=5159307

[Tanit]

The obverse seems to match but the reverse is not the same. 

It's confirmed: the coin measures 27 mm

[SC]

Those images are not from the same coin.

One is a 4th century Roman imperial coin that would be approx 17mm did, the other is a larger provincial.

The shapes are not even the same.

SC